Core for manufacturing pneumatic-tire shoes.



w. T. OHILD S; GORE FOR MANUFACTURING PNEUMATIC ms'snoas.

APPLIUATION FILED JULY 29,1910 Y Patented July 9, 1.912.

i 0 4" v 6 3 i afar}? fig 9 EV RY'TORN V- WILBUR T. CHILDS,

GET AKRON, OHIO, ASSIGNOR OF ONE-HALF TO FRANK NOLTE AND ONE-HALF TO MARTIN D. KUHLKE, BOTH OF AKRON, OHIO.

ORE FOR MANUFACTURING PNEU1VIATIG-TIRE SHOES.

Specification of Letters Patent.

Patented Juiyifi, it) 17%.

Application filed July 23, 1910. Serial No. 574,582.

To all whom it may concern Be it known that I, .Vrnnun THOMAS CHILDS, a citizen of the United States, re-

siding at Akron, in the county of Summit and State of Ohio, have invented new and useful Improvements in Cores for Manufacturing Pneumatic-Tire Shoes, of which the following is a specification.

This invention relates to improvements in collapsible cores for manufacturing the outer-shoes 01": double-tube pneumatic tires, and the object thereof is to provide a collapsible core which may be quickly assembled or collapsed, the invention contemplating the provision of a plurality of segments,

which, when united, will form an annular core-body for imparting to the interior of the tire-shoe during the manufacture thereof, the proper shape to receive the inner in flat-able tube, the' invention more particularly residing in the means whereby the various segments constituting the body portion of the core, are temporarily united.

A furthervobject of the invention is to provide a device of the character described in which the various segments constituting the body portion of the core may be securely united together and further provided with means whereby they may be quickly assembled for use and collapsed for removal from the interior of the tire-shoe after vulcanization:

"With the foregoing and other objects in view, the invention consists in the novel construction, combination and arangcment of parts constituting the i veution to be here inafter spccilicall y described and illustrated in the accompanying drawings which form a part hereof wherein is-shown the preferred embodiment of the invention, but it is to be understood that changes, variations and modifications can be resorted to which come within the scope of the claims hc eunto appended.

In the drawings in which similar reference numerals indicate like parts in the differcnt figures: Figure 1 is plan view of a ring-core elnbodying this invention. Fig. is a sectional view of thedcvice shown in Fig. 1 on line A; and, Fig. 3 is a plan view of the outer face of: a clampi, washer cmploycd in connection with this invention. The ring-core is constructed oi a plurnlily of segment-shaped. members, which, when united together by means to be hereinafter described, constitute an annulus, t 1e outer face of which is shaped to il'npart the desired configuration to the inner surface of a tire-sh0e manufactured thereon. These ments are designated in the drawings by the reference numerals 1, 2. 3 and 4t. .iil these segment-shaped members is when being made to provide opcniu therein for reducing the weight of finished product, and with the ends (3 oi.

segment closed to present a smooth suricce to each other, so that when arranged in abutting relation they form a complete an nulns. Each of the segment-aha d members is further provided with an i. wardlyextending flange 7 of each The flange I segment-shaped member is provided with two inward]y-eXtcnding IugsS at the ends thereof, said lugsbeing senii-circularlyshaped so that when any two segmentshapedmembe'rs are arranged in abutting relation, as shown in Fig. 1, the lugs on abutting sections will register to produce a semi-circular projection or lug extending iii-- wardly from the flange 7 Each of: the lugs 8 on abutting sections is provided with a semi-circular centrally-arranged groove 9, so that when two segment-shaped members are united, the registering grooves 5) constitute a cylindrical opening with the axis of each opening positioned on the lineof severance between abutting segn'icnt-shaped members, Concentric with the axes of said openings,

there is formed on both sides of each of the i Gin lugs 8, semi-circular g 10, which,

when the lugs on contiguous p members are arranged in abutting relation, will unite to form annular grooves, the side walls of which are inclined for a purpose to be later described. A dapted to be mounted in the groove on one side of each of the pairs of united lugs S is'a clamping washer 1]. provided on one taco with a projecting annular ridge l2, shaped to seat in the united grooves formed on that particular side of the abutting lugs 1. The washms 11 are each provided with a transverscly-elongated opening 13 to receive the stem of a clamping bolt l -l which has a T-shaped head 15 of such a size as to freely pass through said opening 13 when turned to lining the head in. alincmcut therewith. The opposite faces of the washers 11 from those which bear the annular ridgcs 12 are provided with cylindrical recesses 16 of 'suiiicicnt size to receive the head 15 and permit the seating of the same therein, the arrangement being such that when the head 15 of the bolt 14: is in alinement with the opening 18, thewasher is freely removable therefrom; but when the head 15 of the bolt 14 is given a one-quarter revolution, it seats on the floor of the recess 16 which surrounds the opening 13. Positioned on the opposite sides of the united lugs 8 is a clamping washer 18 provided with an annular ridge 19 adapted to seat in an annular groove 20 formed in the opposite faces of the combined lugs 8. The washers 18 are provided with cylindrical openings 21- to receive the bolts 14 which have threaded ends for clamping nuts 22, The semi-circular grooves 9 which form the openings through which the stem portions of the bolts 1 1 are passed, are-of suflicient size to permit the passage therethrough of the head 15 of each bolt.

p The operation of assembling a ring-core constructed in'accordance with this invention, is as follows: The segment-shapedv members are asse1nbled,-as shown in Fig. 1,

with the lugs 8 in abutting relation so that the semi-circular grooves 9 will register with each other, after which the clamping, washers 11 and 18 are seated in the annular grooves 10 and 20 and the bolts 14 are passed through the openings in the washers and the latter are clamped securely in position in their re spective g1 coves by means of the nuts 22, in

. doing which the heads 15 of the bolts 14 are positioned to seat on the floors 17 of the recesses 16 in the washers 11. When it is desired to collapse the core the nuts 22 are released sufficiently to permit the heads 15 of the bolts to be given a quarter'of a revolution to bring the heads into alinement with the openings 13, after which the bolts may be drawn through their respective washers 11, permitting the various segment-shaped members of the core to be separated. The annular grooves 10 and 20 are arranged on opposite sides of the lugs 8 and are so shaped that the projecting ridges 12 and 19 of the oppositely-disposed clamping washers will bear against the inclined side walls thereof, as to exert a clamping action for drawing the abutting lugs them this position.

It will be. apparent that by" constructing a r1ng-core in accordance with this inven-, tron, the various segment-shaped members thereof may be assembled and collapsed with great rapidity, and in collapsing-the core 8. together for holding a 4 Witnesses inclined to make the same wedge-shaped for permitting its easy removal inwardly.

I claim: 1. In a collapsible core for the manufacture of tires, the combination of a series of I segmental shaped sections adapted to be assembled into a circular core, the ends of the sections abutting against each other and being formed with corresponding flanges.

having registering notches therein and also formed with registering semicircular grooves which are concentric with the notches and have inclined walls, washer members applied to opposite sides of the flanges and formed with annular. flanges adapted to be received within the registering semicircular grooves, the said annular flanges being beveled for cooperation with the inclined walls of the annular grooves to wedge the core sections tightly together, and

bolt members connecting the washer members extending through the openings formed by the before mentioned registering notches.

2. In a collapsible core .for the manufacture of tires, the combination of a series of segmental shaped sections provided upon the concave sides thereof with inwardly extending flanges, the said sections being adapted to be assembled into an annular core'and the ends of the flanges then abut ting against each other to provide an annular flange projecting inwardly from the core, the abutting ends of the said flanges being formed with registering notches and also with registering semicircular grooves concentric with the notches, bolt members extending through the openings formed by the registering notches, and washer members applied to the bolt members upon opposite sides of the flanges, the said washer members being formed with annular flanges adapted to engage the registering semi-circular grooves to lock the core sections together.

In testimony whereof I have hereunto "set my hand in presence of two subscribing witnesses.

WILBUR T. CHILDS.

GLENARA Fox, C, E. HUMPHREY. 

